As well as encountering and battling her childhood friends at various points during her journey, Hilda will also meet a man known as N, who wishes to create separate worlds for humans and Pokémon. In order to achieve his goals, he and Hilda will battle several times during the course of the game. Hilda will also battle Team Plasma at various stages of her journey. At the game's climax, Hilda is recognized as a hero by Reshiram or Zekrom, depending on the version.

As a non-playable character

If not chosen as the player (that is, the male character was chosen as the player), Hilda appears as the player's partner in the Battle Subway when choosing to ride the Multi-Train. Two of the following Pokémon are picked from the corresponding list, depending on what the player wants her to base her team on. If the player chooses "A balance between the two," Hilda's Pokémon are chosen from either list.

Battle Subway Pokémon

This is a list of all the Pokémon used in the Multi Train and Super Multi Train battles. Each Pokémon has a non-Hidden Ability that, along with gender, is randomly selected. These Pokémon will always have the maximum 31 individual values across every stat and the full 510 effort values evenly distributed among the noted stats (rounding down).